NGC 6531

Number of stars per data source

	Reference  470 :    1 star
	Reference  587 :    8 stars

References

 470

Knude J.

(1992) Astron. Astrophys. Suppl. 92, 841

uvby Beta observations of 528 type B stars with V between the 8th and 9th magnitude

1992A&AS...92..841K

 587

Pena J.H., Garcia-Cole A., Hobart M.A., de la Cruz C., Plascencia J.C., Peniche R.

(2003) Rev. Mex. Astron. Astrofisica 39, 171

uvby beta photoelectric photometry of the open cluster NGC 6823

2003RMxAA..39..171P